[102.08] BATSE Observations of the Hard X-Ray Transient GRS1915+105

The Burst and Transient Source Experiment (BATSE) onboard the Compton Gamma Ray
Observatory has been monitoring the unusual X-ray transient source GRS1915+105
since its discovery by WATCH in August 1992 (Castro-Tirado et al., IAU Circ.
5590). The source was observed in BATSE data as early as May 1992 and was
still visible as of October 1994. The source exhibits a hard power law
spectrum (from -2.5 to -3.0) in the 20 - 200 keV range with erratic changes in
intensity over days to weeks. While the nature of this source is still unknown,
recent observations by the Nancay Radiotelescope and the Very Large Array
during March/April 1994 showed a strong radio outburst followed by large
proper motions of a pair of radio condensations emerging from this source
(Mirabel et al.,1994). We examine here coincident BATSE observations to the
March 1994 radio output for correlated behavior in the hard X-ray and radio
bands.